NEW YORK, March 17 (UPI) --
British Duchess Sarah Ferguson
and The Backstreet Boys are to guest star on the penultimate episode of the U.S. competition series "The Celebrity Apprentice."
They will be seen in the show slated to air Thursday, NBC announced Monday.
Two of the four remaining celebrities will be axed in the last installment before the live finale airs March 27, the network said.
Tiffany Fallon, Nadia Comaneci, Gene Simmons, Jennie Finch, Nely Galan, Marilu Henner, Tito Ortiz, Omarosa and Stephen Baldwin are the nine celebrities who have been fired by Donald Trump to date. Actor Vinny Pastore resigned.
The final four celebrities competing for charity are Trace Adkins, Carol Alt, Lennox Lewis and Piers Morgan.
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